using System;

public class Program

{

    public static void Main()

    {

        /*

        //Declar interger i

        //THis is called an INDEX variable

        int i = 4;

        //While loop

        while ( i < 11 )

        {

            Console.WriteLine(i);

            i = i + 1;

        }

        // A. Index

            */

    int i = 1;

        int numSum = 0;

        while ( i < 101 )

        {

            Console.WriteLine(i);

        numSum = numSum + i;

        i = i + 1;

    }

        Console.WriteLine("The answer is " + numSum + ".");

        }

    }

​